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Cura CI, Duffy T, Lucero RH, Bisio M, Péneau J, Jimenez-Coello M, Calabuig E, Gimenez MJ, Valencia Ayala E, Kjos SA, Santalla J, Mahaney SM, Cayo NM, Nagel C, Barcán L, Málaga Machaca ES, Acosta Viana KY, Brutus L, Ocampo SB, Aznar C, Cuba Cuba CA, Gürtler RE, Ramsey JM, Ribeiro I, VandeBerg JL, Yadon ZE, Osuna A, Schijman AG. Multiplex Real-Time PCR Assay Using TaqMan Probes for the Identification of Trypanosoma cruzi DTUs in Biological and Clinical Samples. PLoS Negl Trop Dis 2015; 9:e0003765. [PMID: 25993316 PMCID: PMC4437652 DOI: 10.1371/journal.pntd.0003765] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 04/16/2015] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Trypanosoma cruzi has been classified into six Discrete Typing Units (DTUs), designated as TcI-TcVI. In order to effectively use this standardized nomenclature, a reproducible genotyping strategy is imperative. Several typing schemes have been developed with variable levels of complexity, selectivity and analytical sensitivity. Most of them can be only applied to cultured stocks. In this context, we aimed to develop a multiplex Real-Time PCR method to identify the six T. cruzi DTUs using TaqMan probes (MTq-PCR). METHODS/PRINCIPAL FINDINGS The MTq-PCR has been evaluated in 39 cultured stocks and 307 biological samples from vectors, reservoirs and patients from different geographical regions and transmission cycles in comparison with a multi-locus conventional PCR algorithm. The MTq-PCR was inclusive for laboratory stocks and natural isolates and sensitive for direct typing of different biological samples from vectors, reservoirs and patients with acute, congenital infection or Chagas reactivation. The first round SL-IR MTq-PCR detected 1 fg DNA/reaction tube of TcI, TcII and TcIII and 1 pg DNA/reaction tube of TcIV, TcV and TcVI reference strains. The MTq-PCR was able to characterize DTUs in 83% of triatomine and 96% of reservoir samples that had been typed by conventional PCR methods. Regarding clinical samples, 100% of those derived from acute infected patients, 62.5% from congenitally infected children and 50% from patients with clinical reactivation could be genotyped. Sensitivity for direct typing of blood samples from chronic Chagas disease patients (32.8% from asymptomatic and 22.2% from symptomatic patients) and mixed infections was lower than that of the conventional PCR algorithm. CONCLUSIONS/SIGNIFICANCE Typing is resolved after a single or a second round of Real-Time PCR, depending on the DTU. This format reduces carryover contamination and is amenable to quantification, automation and kit production.
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Affiliation(s)
- Carolina I. Cura
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Tomas Duffy
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Raúl H. Lucero
- Instituto de Medicina Regional, Universidad Nacional del Nordeste, Resistencia, Chaco, Argentina
| | - Margarita Bisio
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
| | - Julie Péneau
- Laboratoire Hospitalier et Universitaire-CH Andrée Rosemon, Cayenne, French Guiana, France
| | - Matilde Jimenez-Coello
- Laboratorio Biología Celular, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi”, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Eva Calabuig
- Servicio de Medicina Interna, Hospital Politécnico LA FE, Valencia, Spain
| | - María J. Gimenez
- Servicio de Microbiología, Hospital Universitario y Politécnico LA FE, Valencia, Spain
| | - Edward Valencia Ayala
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Sonia A. Kjos
- Department of Biology, University of Minnesota Duluth, Duluth, Minnesota, United States of America
| | - José Santalla
- Laboratorio de Parasitología, Instituto Nacional de Laboratorios en Salud, Ministerio de Salud y Deportes de Bolivia, La Paz, Bolivia
| | - Susan M. Mahaney
- Southwest National Primate Research Center and Department of Genetics, Texas Biomedical Research Institute, San Antonio, Texas, United States of America
| | - Nelly M. Cayo
- Instituto de Biología de la Altura, Universidad Nacional de Jujuy, Jujuy, Argentina
| | - Claudia Nagel
- Epidemiología e Infectología Clínica, Hospital Universitario Fundación Favaloro, Buenos Aires, Argentina
| | - Laura Barcán
- Sección Infectología, Servicio de Clínica Médica, Hospital Italiano, Buenos Aires, Argentina
| | - Edith S. Málaga Machaca
- Laboratorio de Investigación en Enfermedades Infecciosas, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Karla Y. Acosta Viana
- Laboratorio Biología Celular, Centro de Investigaciones Regionales “Dr. Hideyo Noguchi”, Universidad Autónoma de Yucatán, Mérida, Yucatán, Mexico
| | - Laurent Brutus
- Institut de Recherche pour le Développement and University Paris Descartes, UMR 216, Mother and Child Facing Tropical Diseases, Paris, France
| | - Susana B. Ocampo
- Instituto de Biología de la Altura, Universidad Nacional de Jujuy, Jujuy, Argentina
| | - Christine Aznar
- Laboratoire Hospitalier et Universitaire-CH Andrée Rosemon, Cayenne, French Guiana, France
| | - Cesar A. Cuba Cuba
- Parasitologia Médica e Biologia de Vetores, Área de Patologia, Faculdade de Medicina, Universidade de Brasilia, Brasilia DF, Brazil
| | - Ricardo E. Gürtler
- Laboratorio de Eco-Epidemiología, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Janine M. Ramsey
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula, Chiapas, Mexico
| | - Isabela Ribeiro
- Drugs and Neglected Diseases Initiative, Genève, Switzerland
| | - John L. VandeBerg
- Southwest National Primate Research Center and Department of Genetics, Texas Biomedical Research Institute, San Antonio, Texas, United States of America
| | - Zaida E. Yadon
- Pan American Health Organization (PAHO), World Health Organization (WHO), Washington, D.C., United States of America
| | - Antonio Osuna
- Institute of Biotechnology, Molecular Parasitology Group, University of Granada, Granada, Spain
| | - Alejandro G. Schijman
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres”—INGEBI-CONICET, Buenos Aires, Argentina
- * E-mail:
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Cura CI, Mejía-Jaramillo AM, Duffy T, Burgos JM, Rodriguero M, Cardinal MV, Kjos S, Gurgel-Gonçalves R, Blanchet D, De Pablos LM, Tomasini N, da Silva A, Russomando G, Cuba CAC, Aznar C, Abate T, Levin MJ, Osuna A, Gürtler RE, Diosque P, Solari A, Triana-Chávez O, Schijman AG. Trypanosoma cruzi I genotypes in different geographical regions and transmission cycles based on a microsatellite motif of the intergenic spacer of spliced-leader genes. Int J Parasitol 2010; 40:1599-607. [PMID: 20670628 DOI: 10.1016/j.ijpara.2010.06.006] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 06/07/2010] [Accepted: 06/15/2010] [Indexed: 11/19/2022]
Abstract
The intergenic region of spliced-leader (SL-IR) genes from 105 Trypanosoma cruzi I (Tc I) infected biological samples, culture isolates and stocks from 11 endemic countries, from Argentina to the USA were characterised, allowing identification of 76 genotypes with 54 polymorphic sites from 123 aligned sequences. On the basis of the microsatellite motif proposed by Herrera et al. (2007) to define four haplotypes in Colombia, we could classify these genotypes into four distinct Tc I SL-IR groups, three corresponding to the former haplotypes Ia (11 genotypes), Ib (11 genotypes) and Id (35 genotypes); and one novel group, Ie (19 genotypes). Genotypes harbouring the Tc Ic motif were not detected in our study. Tc Ia was associated with domestic cycles in southern and northern South America and sylvatic cycles in Central and North America. Tc Ib was found in all transmission cycles from Colombia. Tc Id was identified in all transmission cycles from Argentina and Colombia, including Chagas cardiomyopathy patients, sylvatic Brazilian samples and human cases from French Guiana, Panama and Venezuela. Tc Ie gathered five samples from domestic Triatoma infestans from northern Argentina, nine samples from wild Mepraia spinolai and Mepraia gajardoi and two chagasic patients from Chile and one from a Bolivian patient with chagasic reactivation. Mixed infections by Tc Ia+Tc Id, Tc Ia+Tc Ie and Tc Id+Tc Ie were detected in vector faeces and isolates from human and vector samples. In addition, Tc Ia and Tc Id were identified in different tissues from a heart transplanted Chagas cardiomyopathy patient with reactivation, denoting histotropism. Trypanosoma cruzi I SL-IR genotypes from parasites infecting Triatoma gerstaeckeri and Didelphis virginiana from USA, T. infestans from Paraguay, Rhodnius nasutus and Rhodnius neglectus from Brazil and M. spinolai and M. gajardoi from Chile are to our knowledge described for the first time.
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Affiliation(s)
- Carolina I Cura
- Laboratorio de Biología Molecular de la Enfermedad de Chagas, INGEBI-CONICET, Buenos Aires, Argentina
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Gurgel-Gonçalves R, Palma ART, Menezes MNA, Leite RN, Cuba CAC. Sampling Rhodnius neglectus in Mauritia flexuosa palm trees: a field study in the Brazilian savanna. Med Vet Entomol 2003; 17:347-350. [PMID: 12941022 DOI: 10.1046/j.1365-2915.2003.00448.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Two sampling methods (manual capture and live-baited adhesive traps) were compared for collecting the bug Rhodnius neglectus Lent (Hemiptera: Reduviidae: Triatominae) from palm trees, Mauritia flexuosa L. (Arecaceae), in the savanna of Brasília DF. R. neglectus was found in 19/50 (38%) of palm trees sampled. The detection rate was much higher by visual inspection and manual capture (18/50=36%) than by our trapping method (5/50=10%), although one tree was found to be positive by trapping but not by manual capture. Bugs collected manually were mostly (146/154=95%) found among the dead organic material in palm crowns. In combination, these sampling techniques are useful for quick detection of triatomine bug infestation in palm trees, especially in areas of high ecological value where the palms should not be cut and dissected, but arboreal Rhodnius are suspected to transmit enzootic Trypanosoma cruzi that might represent a risk of causing human cases of Chagas disease.
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Affiliation(s)
- R Gurgel-Gonçalves
- Laboratório de Parasitologia Médica, Area de Patologia, Faculdade de Medicina, Universidade de Brasília, Brasília DF, Brazil
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